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O-LevelChemistryStoichiometry5070/11 · Oct/Nov 2025 · Q101 Mark

How many atoms are there in 27.0 g of water, H2O?

A9.030 x 10^23
B1.806 × 10^24
C2.709 × 10^24
D3.612 x 10^24

✓ Correct answer

C: 2.709 × 10^24

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About this question

Topic
Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, Oct/Nov 2025 Paper 1 Variant 1, question 10.

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